The 3rd installment in the 2nd Godzilla series involves three people from the 23rd century travel back in time to the late 20th century to warn Japan of its terrible fate. The country will become a radioactive wasteland, due to the terrible onslaught of Godzilla. It's decided that the travelers must go back in time to teleport the Big G, in dinosaur form, to another location - to prevent the dinosaur from being exposed to radiation and turning him into the terrible he is now. The time travelers succeed with their mission. But one of the future people leave behind three man-made creatures, called Dorats, behind and travel ahead in time to the late 20th century... only to discover that now Godzilla is gone - but King Ghidorah is now destroying Japan. What can be done to stop this terrible menace?